JitArm64: Minor mtfsfix optimization

BFI takes two cycles on many CPUs, whereas AND (immediate) only takes one.
2024-04-20 11:30:06 +02:00 · 2024-04-20 11:30:06 +02:00 · 4ac52cf053
parent 637ae12ff4
commit 4ac52cf053
1 changed files with 2 additions and 1 deletions
--- a/Source/Core/Core/PowerPC/JitArm64/JitArm64_SystemRegisters.cpp
+++ b/Source/Core/Core/PowerPC/JitArm64/JitArm64_SystemRegisters.cpp
@ -896,7 +896,8 @@ void JitArm64::mtfsfix(UGeckoInstruction inst)
  }
  else if (imm == 0x0)
  {
-    BFI(WA, ARM64Reg::WZR, shift, 4);
+    const u32 inverted_mask = ~mask;
+    AND(WA, WA, LogicalImm(inverted_mask, GPRSize::B32));
  }
  else
  {